The chestnut blight fungus world tour: successive introduction events from diverse origins in an invasive plant fungal pathogen
RAVIGNÉS, V.
Centre de Coopération Internationale en Recherche Agronomique pour le Développement [Cirad]
< Reduce
Centre de Coopération Internationale en Recherche Agronomique pour le Développement [Cirad]
Language
en
Article de revue
This item was published in
Molecular Ecology. 2012, vol. 21, n° 16, p. 3931-3946
Wiley
English Abstract
Clonal expansion has been observed in several invasive fungal plant pathogens colonizing new areas, raising the question of the origin of clonal lineages. Using microsatellite markers, we retraced the evolutionary history ...Read more >
Clonal expansion has been observed in several invasive fungal plant pathogens colonizing new areas, raising the question of the origin of clonal lineages. Using microsatellite markers, we retraced the evolutionary history of introduction of the chestnut blight fungus, Cryphonectria parasitica, in North America and western Europe. Combining discriminant analysis of principal components and approximate Bayesian computation analysis, we showed that several introduction events from genetically differentiated source populations have occurred in both invaded areas. In addition, a low signal of genetic recombination among different source populations was suggested in North America. Finally, two genetic lineages were present in both invaded areas as well as in the native areas, suggesting the existence of genetic lineages with a high capacity to establish in diverse environments and host species. This study confirmed the importance of multiple introductions, but questioned the role of genetic admixture in the success of introduction of a fungal plant pathogen.Read less <
Keywords
biological invasion
genetic admixture
English Keywords
approximate Bayesian computation analysis
Cryphonectria parasitica
mode of reproduction
multiple introductions
Origin
Hal imported